Calculate Parameters of Resistor and Its Power for One LED

Calculate Parameters of Resistor and Its Power for One LED



All of us attended school so I think everybody can remember the "Ohm's law” that is I=U/R.
Then we will need an arithmetic formula to calculate power (P=IU).
Using these formulas we can select necessary resistor for connecting light-emitting diodes to
any power supply source.
As an example we can take diode BL-L813UWC ...